Roof Covering Defects

Weak points can be created where services pass through the covering.

Roof covering defects. Here we give photographs of slate roof conditions including normal wear on slate roofs worn out slate roofs types of slate roof wear and damage and stains or discoloration on slate roofs. Build up of moss. People go up with caulking and plastic roof cement and improper materials that are in no way intended for that purpose harriman says. Flat roof defect 2 blistering.

Slate coverings to older roofs were secured with steel nails which are susceptible to corrosion known as nail rot or nail sickness. Damaged missing and slipped slates. Typically before 1890 nineteenth century roofs often contained narrow rafters. Some common causes of general roofing defects include.

Installing flat roof coverings be they felt asphalt or sheet metal is a specialised job. Note or take photographs of. Damage as a result of making. Pitched roof coverings roof defects 1.

This slate roofing photo series shows all kinds of roofing slate defects. One of the most common problems we see with metal roofs is improper repair. Using materials that are not intended for application on specific roof types can result in permanent damage to the roof. Slate roof defect photo library.

Defects in pitched roofs normally caused by 3 main factors. They occur when a gas usually water vapor is trapped within the roofing system either between the plies or between the plies and the insulation. Even small amounts of trapped moisture can result in your flat roof membrane detaching from the layer below and cause roof blisters. Check for any damaged missing and slipped slates.

Warm air rising from within a property reaches the underside of the roof covering cools and deposits moisture on the underside of the slates saturating the nail heads. Diy felt jobs are the biggest culprit and are simply storing up problems for the future. Check for poor cement pointing and in particular for damaged or missing lead or cement flashings. This is the most common roofing problem and it tends to get worse during the day when the heat of the sun causes the trapped moisture to expand.

Many of the problems associated with felt coverings to flat roofs stem from poor workmanship. Bubble like or long thin raised areas on the roof are called blisters. Damage can be caused by workers operating in the area. Poor designs found in pitched roofs inadequately sized members.

Blisters are the most common roofing problem.